guests = ['Biden', 'Musk', 'Trump']
# Musk 忙于星舰无法赴约
unable_to_attend = guests.pop(1)
print(f'{unable_to_attend} unable to attend.')
guests.insert(0,'Zelda')
guests.insert(1,'Link')
guests.append('Ganon')
print(f"I invited {len(guests)} guests.")
